- If 2x=5-√21 then prove that x^3+x^-3=110?

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The common ratio for the following geometric sequence 1/3 3/15 9/75 27/375? Use Newton’s method to determine the positive root of the quadratic equation
5x2 +11x −17=0,? An equation of motion is given by x=at^2+bt+c where a,b,c are unknown variables. If x=position and t= time, what are dimensions of a,b,c? ? Was slavery an integral part of the US economy? Find the value of a&b if (x^2-5x+4) is a factor of the polynomial 2x^3+ax^2+bx-4. Express in factored form.?